Honestly, it all becomes pretty subjective when you see how many ways it can be correlated.
For example, Suzanne Caygill switched summer and winter from Johannes Itten, but not everyone agrees with her doing that. See this article.
Angela Wright's Color Psychology flips Spring and Summer's correlated elements from Caygill, but the shapes and colors remain roughly the same, so it's not that big a deal.
Irenee Riter doesn't really talk about the seasons at all, but does mention the humors. See History of Personality Analysis
If you look at the four humors, the seasons associated with the elements are very different altogether. Spring is Air, as in Caygill, Summer is Fire, Autumn is Earth and Winter is Water.
|DYT & Caygill etc.||Wright||Native American||Humors||Tarot & Astrology|
|Spring||Air||Water||Air||Air - Sanguine||Fire - Wands Intuition|
|Summer||Water||Air||Earth||Fire - Choleric||Water - Cups Feeling|
|Autumn||Fire||Fire||Water||Earth - Melancholic||Earth - Coins Sensation *|
|Winter||Earth||Earth||Fire||Water - Phlegmatic||Air - Swords Thinking *|
Malaya L. Rider, has a bachelor degree in Psychology and a Masters degree from UCLA in Dance/Movement Therapy.
The Five Chinese Elements
Fire = Summer
Earth = Late Summer
Metal = Autumn
Water = Winter
Choosing Foods by the Macrobiotic Calendar
Feng Shui Astrology and Shapes